1. Each county and city shall include in its respective building code the requirements of this section. If a county or city has no building code, it shall adopt those requirements by ordinance and provide for their enforcement by its own officers or employees or through interlocal agreement by the officers or employees of another local government. Additionally, each county and city shall prohibit by ordinance the sale and installation of any plumbing fixture which does not meet the standards made applicable for the respective county or city pursuant to this section.

2. Except as otherwise provided in subsections 3 and 4, each residential, commercial or industrial structure on which construction begins on or after March 1, 1992, and each existing residential, commercial or industrial structure which is expanded or renovated on or after March 1, 1992, must incorporate the following minimal standards for plumbing fixtures:

(a) A toilet which uses water must not be installed unless its consumption of water does not exceed 3.5 gallons of water per flush.

(b) A shower apparatus which uses more than 3 gallons of water per minute must not be installed unless it is equipped with a device to reduce water consumption to 3 gallons of water or less per minute.

(c) Each faucet installed in a lavatory or kitchen must not allow water to flow at a rate greater than 3 gallons per minute.

(d) A urinal which continually flows or flushes water must not be installed.

3. Except as otherwise provided in subsection 4, each residential, commercial or industrial structure on which construction begins on or after March 1, 1993, and each existing residential, commercial or industrial structure which is expanded or renovated on or after March 1, 1993, must incorporate the following minimal standards for plumbing fixtures:

(a) A toilet which uses water must not be installed unless its consumption of water does not exceed 1.6 gallons of water per flush.

(b) A shower apparatus which uses more than 2.5 gallons of water per minute must not be installed unless it is equipped with a device to reduce water consumption to 2.5 gallons of water or less per minute.

(c) A urinal which uses water must not be installed unless its consumption of water does not exceed 1 gallon of water per flush.

(d) A toilet or urinal which employs a timing device or other mechanism to flush periodically, irrespective of demand, must not be installed.

(e) A urinal which continually flows or flushes water must not be installed.

(f) Each faucet installed in a lavatory or kitchen must not allow water to flow at a rate greater than 2.5 gallons per minute.

(g) Each faucet installed in a public restroom must contain a mechanism which closes the faucet automatically after a predetermined amount of water has flowed through the faucet. Multiple faucets that are activated from a single point must not be installed.

4. The requirements of this section for the installation of certain plumbing fixtures do not apply to any portion of an existing residential, commercial or industrial structure which is not being expanded or renovated.

(Added to NRS by 1991, 1166)